From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Zyngier Subject: Re: [RFC PATCH 1/6] DRIVERS: IRQCHIP: IRQ-GIC: Add support for routable irqs Date: Mon, 30 Sep 2013 15:16:03 +0100 Message-ID: <524987A3.4090204@arm.com> References: <1380549564-31045-1-git-send-email-r.sricharan@ti.com> <1380549564-31045-2-git-send-email-r.sricharan@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: <1380549564-31045-2-git-send-email-r.sricharan@ti.com> Sender: linux-doc-owner@vger.kernel.org To: Sricharan R Cc: "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-omap@vger.kernel.org" , "tglx@linutronix.de" , "linus.walleij@linaro.org" , "santosh.shilimkar@ti.com" , "linux@arm.linux.org.uk" , "tony@atomide.com" , "rnayak@ti.com" , "grant.likely@linaro.org" , "rob.herring@calxeda.com" , Mark Rutland List-Id: devicetree@vger.kernel.org On 30/09/13 14:59, Sricharan R wrote: > In some socs the gic can be preceded by a crossbar IP which > routes the peripheral interrupts to the gic inputs. The peripheral > interrupts are associated with a fixed crossbar input line and the > crossbar routes that to one of the free gic input line. > > The DT entries for peripherals provides the fixed crossbar input line > as its interrupt number and the mapping code should associate this with > a free gic input line. This patch adds the support inside the gic irqchip > to handle such routable irqs. The routable irqs are registered in a linear > domain. The registered routable domain's callback should be implemented > to get a free irq and to configure the IP to route it. Isn't this just another chained interrupt controller? How is it GIC specific? M. -- Jazz is not dead. It just smells funny...